20 But you must bring your youngest brother to me, so that your words may be verified and that you may not die.” This they proceeded to do.

Read Genesis 42:20 Using Other Translations

But bring your youngest brother unto me; so shall your words be verified, and ye shall not die. And they did so.
and bring your youngest brother to me. So your words will be verified, and you shall not die." And they did so.
But you must bring your youngest brother back to me. This will prove that you are telling the truth, and you will not die.” To this they agreed.